Ronseal Super Flexible Primer & Undercoat 750ml White eBay Live all fixings included all fixings included The UN1FILL is a water inlet valve that can adjust from bottom feed to side feed & 1 2" (15mm) to 3 8" (10mm) by easily unscrewing and swapping the thread with the blanking cap providing the ultimate base coat for any topcoat It also has an advanced stain locking mechanism that creates a barrier stopping extractives and tannins found in resinous woods from discolouring your paintwork Super Flexible Wood Primer & Undercoat White 750ml Ronseal Super Flexible Wood Primer & Undercoat utilises a highly flexible resin to improve the performance of your exterior topcoat finish It moves with the wood to maintain adhesion to help prevent cracking and peeling of the topcoat It adheres superbly and both primes and undercoats in one