Well, that’s actually not the case, so let’s have a look at what the Standard says and doesn’t say. “But AS 3740 states that the membrane can’t bond to the bond breaker, therefore you can only use neutral cure silicone!!!” It goes without saying, that these recommendations should also be followed.ĪS3740 - Interpretation of Internal Wet Area Waterproofing Membrane manufacturers generally also recommend these transitioning tapes for Class II and Class I membranes. ![]() These manufacturers generally recommend the use of a transitioning bandage or bond breaker tape, which usually incorporates a rubber component in the bandage to accommodate the expected movement. There are also Class III liquid applied systems, where the manufacturer does not recommend a sealant bond breaker at all. I am yet to see a manufacturer recommend the use of “No more Gaps”, so those type of products should probably be off the table. Similarly, if the manufacturer recommends the use of polyurethane sealants or hybrid sealants, then you should use those. If the membrane manufacturer recommends the use of neutral cure silicone, then that’s what you should use. ![]() “Follow the manufacturer’s instructions.” Should you use a polyurethane sealant? Neutral cure silicone? No more Gaps? Or one of those new hybrid sealants? ![]() The debate continues, especially over the correct bond breaker for Class III liquid applied membranes. While the principle of bond breaking is not new and applies to waterproofing and other industries such as joint sealing, there is still disagreement on what a bond breaker is, what it does and how it applies to the application of a waterproofing membrane.
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