One cannot simply conclude that product liquid silicone B11 is suitable for all textile coatings, electrical and electronic coatings, or glass fiber surface treatment systems based solely on its good elasticity, resistance to aging, or wide operating temperature range. The A/B mixing ratio, vacuum degassing, curing temperature and time, substrate type, coating thickness, environmental cleanliness, and dilution process must all be confirmed before making such a judgment. Then, the problem could be attributed to platinum catalyst poisoning, uneven mixing, insufficient curing, or poor compatibility between the substrate and the coating. Product B11 can be considered as a candidate for additively cured liquid silicone coatings, but it must undergo small-scale tests, curing verification, and actual working condition confirmation.


Why does additively cured liquid silicone often exhibit poor curing in textile or electronic coatings?


If the A/B components are not accurately measured in a 1:100 ratio or are not mixed evenly, resulting in insufficient crosslinking density or incomplete curing in some areas.


The rubber mixture comes into contact with organic substances containing N, P, S, etc., or ions such as Hg, Bi, As, and compounds containing acetylenic and vinyl groups, causing platinum catalyst poisoning and preventing curing.


Contact with PVC materials, as PVC contains lead, can cause catalyst poisoning and lead to slower or incomplete curing.


Some organic pigments cause slower or incomplete curing, and no pigment compatibility verification has been conducted.


Insufficient vacuum degassing, with residual bubbles in the coating, affects appearance, adhesion, and protective properties.


The curing temperature of 145-155°C × 70s does not match the coating thickness, resulting in insufficient curing inside when the coating is too thick or over-curing when it is too thin or damage to the substrate.


The substrate surface is not cleaned or has oil stains, residues of slurry, or additives, affecting the adhesion and uniformity of the coating.


The dilution ratio or choice of diluent affects the coating viscosity and curing activity.


When switching from other liquid silicone, solvent-based coatings, or polyurethane coatings, the ratio, degassing, and curing conditions must not be adjusted.


Improper storage conditions or exceeding the shelf life can lead to a decrease in the activity of A/B components, affecting the consistency of curing.


The substrate in textile coatings has limited temperature resistance, and curing at 145-155°C may affect the texture, color, or performance of the fabric.


In electronic coatings, the surface treatment of glass fibers has not evaluated the actual conditions for achieving the V0 flame retardant rating.


First, determine which stage the curing or coating problem occurs.


Failure stage Possible causes Priority inspection direction
No curing or incomplete curing after mixing A/B ratio deviation, mixing unevenness, platinum catalyst poisoning Accuracy of measurement, mixing efficiency, environmental cleanliness
Coating surface becomes sticky or curing is slow Catalyst poisoning, interference from pigments or substrate, insufficient curing temperature Substrate and pigment compatibility, curing conditions
Coating contains bubbles or pinholes Insufficient vacuum degassing, thick coating, substrate exhaust Degassing process, coating thickness, substrate treatment
Poor coating adhesion or detachment Unclean substrate, thick coating, insufficient curing Surface treatment, coating thickness, curing conditions
Coating becomes hard or fabric becomes brittle Curing temperature too high or time too long, thick coating Conditions for curing, coating thickness, substrate temperature resistance
Electronic coating self-extinguishing does not reach V0 Revised dilution ratio, coating thickness, glass fiber treatment method Inspection during entry, storage records, pigment compatibility
Not curing after contact with PVC PVC lead causing platinum catalyst poisoning Substrate type, isolation layer, alternative substrate
If only focusing on "whether product B11 was used" without recording the A/B ratio, degassing, curing temperature, substrate and pigment compatibility, it is usually difficult to accurately determine whether it is a material problem or a process problem.


Why is increasing the curing temperature or increasing the A/B dosage not always effective?


Product B11 plays a role of platinum addition curing in the system. It is influenced by the A/B ratio, defoaming, curing temperature, substrate and catalyst poisons. Simply increasing the temperature or dosage may cause side effects.


Increasing the curing temperature may lead to over-sulfurization on the coating surface or damage to the substrate, while the interior is still not fully cured.


Increasing the total dosage of A/B does not change the 1:100 ratio requirement. Excessive adhesive will not increase the crosslinking density, but will cause waste.


Extending the curing time may improve deep curing, but it may affect the fabric feel, color and production efficiency.


Increasing the dilution ratio may improve the coating thickness and feel, but it may reduce self-extinguishing ability and protective performance.


After platinum catalyst poisoning, increasing the temperature or extending the curing time cannot achieve normal curing.


When the substrate surface is not cleaned, only adjusting the curing conditions cannot solve the adhesion problem.


When pigments cause curing to slow down, only increasing the temperature cannot eliminate the interference of pigments on the catalyst.


When the coating is too thick, only increasing the temperature may lead to over-sulfurization on the surface while insufficient sulfurization in the interior.


Therefore, when optimizing, one should observe the A/B ratio, defoaming, curing conditions, substrate treatment, pigment compatibility and coating thickness, rather than only adjusting a single parameter.


What are the differences between Product B11 and similar liquid silicone resins or coating solutions in terms of selection?


Comparison direction Product B11 (addition type liquid silicone rubber) Solvent-based silicone coating Polyurethane coating Ordinary condensation type silicone Selection boundary
Curing mechanism Platinum catalytic addition curing, 145-155℃×70s Solvent evaporation + crosslinking Biphasic reaction curing Wet air condensation curing Choose based on substrate temperature resistance and process requirements
Operating temperature -40℃～250℃ Different for each system Generally Generally Prioritize addition type silicone rubber for high-temperature applications
Recovery and aging resistance Excellent Generally Good Excellent Generally Dimensional stability requirements are high, prioritize B11
Linear shrinkage rate Low Depending on the system Medium Medium Dimensional stability requirements are high, prioritize B11
Platinum catalyst poisoning sensitivity Sensitive to N, P, S, heavy metals, alkynes, vinyl compounds and PVC Not related to platinum Not involved Not involved Need to strictly control substrate and environmental pollution
Textile coating feel Need to verify the effect of thickness and curing on the fabric Adjustable Adjustable Need to verify Choose based on feel, color and washability requirements
Electronic coating self-extinguishing ability After dilution, can be used on fiberglass surfaces, self-extinguishing ability can reach V0 level Need to verify Need to verify Need to verify based on actual thickness and dilution ratio
Application scenarios Texile coating, electrical and electronic fiberglass coating General coating General coating General sealing Need to choose based on substrate and protection requirements
Why is it still necessary to conduct complete tests for compatibility with substrates and pigments?


Our company's public information states that Product B11 is used for surface coating on cotton and linen fabrics, and is diluted appropriately for use on glass fiber surfaces, with self-extinguishing ability reaching V0 level. However, when used in actual systems, there may still be:


Substrate type, surface treatment and temperature resistance differences.


Interference of pigments, resins and additives on platinum catalyst.


A/B measurement accuracy, mixing uniformity and vacuum defoaming.


Matching of curing temperature, time and coating thickness.


Dilution ratio and compatibility of diluent.


Environmental cleanliness and catalyst poison control.


Textile feel, color, washability and abrasion resistance requirements.


Electronic coating self-extinguishing ability, adhesion and insulation performance.


Storage conditions and A/B component activity.


Batch-to-batch curing consistency and coating appearance.


Appearance uniformity or short-term curing compliance cannot prove stable long-term use, washability, temperature resistance or flame retardancy performance. Before use, verification should be conducted using the complete formula, actual substrate and working conditions.


What parameters should be confirmed when using Product B11?


Parameter category Information to be confirmed
Application direction: Surface coating for cotton and linen fabrics, surface coating for glass fibers, electrical and electronic protection
Base material types: Cotton and linen fabrics, glass fibers, other temperature-resistant substrates
Surface treatment: Cleaning method, drying degree, presence or absence of residual sizing and additives
A/B ratio: 1:100, measurement accuracy and mixing uniformity
Defoaming process: Vacuum defoaming conditions, time, vacuum degree
Curing conditions: 145-155℃ × 70s, adjusted according to thickness and size
Coating thickness: Target thickness, uniformity, thinnest point
Sizing process: Dilution ratio, type of diluent, compatibility
Pigments and additives: Pigment type, batch, impact on platinum catalyst
Environmental cleanliness: Avoid N, P, S, heavy metals, alkyne, vinyl compounds and PVC
Storage conditions: Sealed, cool and dry, use according to shelf life
Acceptance indicators: Appearance, hardness, tensile strength, elongation, tear strength, adhesion, self-extinguishing property, hand feel
What should be verified when using product B11?


A/B measurement accuracy and mixing uniformity.


Vacuum defoaming effect and internal bubbles in the coating.


Hardness and mechanical properties after 145-155℃ × 70s curing.


Adhesion between the coating and cotton and linen fabrics or glass fibers.


Hand feel, color and wash resistance, friction resistance of the coating.


Self-extinguishing property V0 of the glass fiber coating after dilution.


Impact of pigments, additives and substrates on platinum catalyst.


Performance stability at -40℃ and 250℃.


Low shrinkage rate and impact fatigue resistance.


Consistency of curing and coating appearance between batches.


Activity and curing speed of A/B components after storage.


Effectiveness of safe operation and ventilation protection.


How to design experiments before using product B11?


Establish a current coating or liquid silicone gel benchmark, record model, A/B ratio, defoaming, curing conditions and failure performance.


Uniform test conditions: substrate, surface treatment, A/B ratio, defoaming process, curing temperature and time, coating thickness.


Set candidate samples: current materials, product B11, different dilution ratios or curing condition gradients.


Complete all process tests: mixing → defoaming → coating → curing → performance testing → wash/flammability verification.


Evaluate actual results: appearance, hardness, strength, elongation, adhesion, self-extinguishing property, hand feel.


Test items: Uniform requirements
Substrate and surface treatment: Consistent
A/B ratio: 1:100
Defoaming process: Consistent
Curing conditions: Set gradients according to test design
Coating thickness: Set according to actual product
Dilution ratio: Set according to test design
Measurement method: Appearance, hardness, strength, elongation, adhesion, self-extinguishing property, hand feel are consistent
When are product B11 not suitable for direct use?


A/B measurement accuracy cannot be guaranteed or mixing is not uniform, resulting in incomplete curing.


The substrate or the environment contains N, P, S, heavy metals, alkyne, vinyl compounds and PVC, causing platinum catalyst poisoning.


Pigments or additives have not been verified for compatibility with platinum catalyst, resulting in slow curing or no curing.


Vacuum defoaming is insufficient, with residual bubbles in the coating, affecting appearance and protection.


The substrate has insufficient temperature resistance, and 145-155℃ curing may damage the fabric or electronic components.


Specific food contact, medical or airworthiness approval is required, but corresponding materials have not been obtained.


There are clear thickness and dilution ratio requirements for self-extinguishing V0, but they have not been verified under actual conditions.


Only have the application direction, but no substrate, A/B ratio, curing and coating thickness data.


The customer requests to directly mix into the in-use system, but cannot control the ratio, defoaming and curing conditions.


The storage conditions did not meet the requirements of sealing and cool, dry environment, resulting in a decrease in the activity of the A/B components.


The textile coating has strict requirements for wash resistance, friction resistance or hand feel, but no special verification has been conducted.


What selection support can our company provide?


As a provider of solutions for the entire organic silicon industry chain, our company can assist in comparing the applicability of bulk-forming liquid silicone rubber B11 in different substrates, coating thicknesses and curing conditions.


For textile coating or glass fiber surface coating projects that need to balance elasticity, aging resistance, low shrinkage rate and self-extinguishing properties, the following information should be provided before selection:


Application direction and substrate type.


Target coating thickness, hand feel and wash resistance requirements.


A/B ratio, defoaming and curing conditions.


Dilution ratio and diluent type.


Compatibility of pigments, additives and substrate with platinum catalyst.


Operating temperature, aging resistance and self-extinguishing requirements.


Current coating material model, ratio and failure performance.


Acceptance method and applicable standards.


After receiving complete materials, we can determine whether to prioritize testing a certain dilution and curing scheme of liquid silicone rubber B11 or choose another coating material route.


Common Misconceptions


The A/B ratio can have a slight deviation.
The usage ratio of product B11 is 1:100. Deviation or uneven mixing can lead to incomplete curing or performance degradation. Precise measurement is required.


The higher the curing temperature, the faster the curing should be.
The range of 145-155℃×70s needs to be matched with the coating thickness and the temperature resistance of the substrate. Excessive temperature may damage the substrate or cause over-curing.


The poisoning of platinum catalyst can be ignored.
Contact with N, P, S, heavy metals, alkyne, vinyl compounds and PVC can lead to non-curing. It is necessary to strictly control the substrate and environmental pollution.


Compatibility with the substrate can directly allow for coating application.
It is still necessary to confirm surface cleanliness, A/B ratio, degassing, curing conditions and pigment compatibility.


25℃ performance is the same, so equal quantities can be substituted.
Different liquid silicone resins have different curing characteristics, sensitivity to platinum catalyst and coating feel. Replacement requires revalidation.


The dilution ratio does not affect self-extinguishing property.
The dilution ratio and coating thickness jointly affect the achievement of V0 self-extinguishing property. It is necessary to verify according to actual conditions.


Product B11 can be used for all textile and electronic coatings.
This product is suitable for cotton and linen fabrics and glass fiber surface coatings. For systems with insufficient temperature resistance, platinum catalyst poisons or special flame retardant requirements, other materials may need to be selected.


It can still be used directly after storage.
It needs to be managed according to the shelf life and storage conditions. After expiration or improper storage, it should be retested for the activity of A/B components and curing performance.


Recommended selection steps


Confirm the application direction: cotton and linen fabric coating, glass fiber surface coating or electrical and electronic protection.


Confirm the substrate type, surface treatment and temperature resistance conditions.


Confirm the A/B ratio, mixing uniformity and vacuum degassing process.


Confirm the curing temperature, time and coating thickness.


Confirm the dilution ratio, diluent and pigment compatibility.


Confirm the use temperature, aging resistance and self-extinguishing requirements.


Select product B11 or other coating materials based on the application scenario.


Set different curing conditions, dilution ratios and coating thickness gradients for small tests.


Test appearance, hardness, strength, elongation, adhesion and self-extinguishing property.


Perform wash resistance, friction resistance, low-temperature and high-temperature aging verification.


Evaluate the consistency of curing among batches and the coating appearance.


Confirm that environmental cleanliness control (avoiding platinum catalyst poisons) is in place.


After multiple batch validations, determine the final usage plan.