I got this response from Forest River for my 2004 FR Cardinal 32ft fifth wheel:
"Our fresh water tanks and holding tanks are composed of “linear low density” polyethylene (LLDPE) material. The “linear” term refers to the polymerization of ethylene with longer-chain olefins. LLDPE is a thermoplastic resin, so it can be melted down and recycled."
I've got many answers here and elsewhere about sealants. So far the best / easiest looks to be FlexSeal paste. However, FlexSeal won't answer me about whether the paste will work on LLDPE. This is what they said:
"Please keep in mind that some rubber or plasticized materials can contain anywhere from 10% to 90% poly-olefins. A Poly-olefin is a type of polymer which by its very nature constantly releases chemicals that are designed to resist proper adhesion. Unfortunately, there is no way of knowing how much of this polymer is in a particular piece of rubber or plastic since manufacturers do not have to disclose this information."
The FR comment above mentions "longer-chain olefins."
Basically I'm very limited as to how I can fix the crack - I'm in no condition to work on it myself and have to rely on a handyman who's never worked on RVs. (The dealer says they won't touch it.) The FlexSeal paste plus wire mesh is something the handyman says he can do; drilling holes or widening the crack to apply sealant isn't an option.
Any suggestions welcome.
"Our fresh water tanks and holding tanks are composed of “linear low density” polyethylene (LLDPE) material. The “linear” term refers to the polymerization of ethylene with longer-chain olefins. LLDPE is a thermoplastic resin, so it can be melted down and recycled."
I've got many answers here and elsewhere about sealants. So far the best / easiest looks to be FlexSeal paste. However, FlexSeal won't answer me about whether the paste will work on LLDPE. This is what they said:
"Please keep in mind that some rubber or plasticized materials can contain anywhere from 10% to 90% poly-olefins. A Poly-olefin is a type of polymer which by its very nature constantly releases chemicals that are designed to resist proper adhesion. Unfortunately, there is no way of knowing how much of this polymer is in a particular piece of rubber or plastic since manufacturers do not have to disclose this information."
The FR comment above mentions "longer-chain olefins."
Basically I'm very limited as to how I can fix the crack - I'm in no condition to work on it myself and have to rely on a handyman who's never worked on RVs. (The dealer says they won't touch it.) The FlexSeal paste plus wire mesh is something the handyman says he can do; drilling holes or widening the crack to apply sealant isn't an option.
Any suggestions welcome.